BGP Dissemination of Flow Specification Rules for Tunneled Traffic
draft-ietf-idr-flowspec-nvo3-09
The information below is for an old version of the document.
| Document | Type |
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|---|---|---|---|
| Authors | Donald E. Eastlake 3rd , Hao Weiguo , Shunwan Zhuang , Zhenbin Li , Rong Gu | ||
| Last updated | 2020-04-12 (Latest revision 2020-01-16) | ||
| Replaces | draft-hao-idr-flowspec-nvo3 | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
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draft-ietf-idr-flowspec-nvo3-09
INTERNET-DRAFT D. Eastlake
Intended Status: Proposed Standard Futurewei Technologies
W. Hao
S. Zhuang
Z. Li
Huawei Technologies
R. Gu
China Mobil
Expires: October 11, 2020 April 12, 2020
BGP Dissemination of
Flow Specification Rules for Tunneled Traffic
draft-ietf-idr-flowspec-nvo3-09
Abstract
This draft specifies a Border Gateway Protocol (BGP) Network Layer
Reachability Information (NLRI) encoding format for flow
specifications (RFC 5575bis) that can match on a variety of tunneled
traffic. In addition, flow specification components are specified for
certain tunneling header fields.
Status of This Document
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Distribution of this document is unlimited. Comments should be sent
to the authors or the IDR Working Group mailing list <idr@ietf.org>.
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The list of current Internet-Drafts can be accessed at
http://www.ietf.org/1id-abstracts.html. The list of Internet-Draft
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http://www.ietf.org/shadow.html.
D. Eastlake, et al [Page 1]
INTERNET-DRAFT BGP Tunnel Flowspec
Table of Contents
1. Introduction............................................3
1.1 Terminology............................................3
2. Tunneled Traffic Flow Specification NLRI................5
2.1 The SAFI Code Point....................................7
2.2 Tunnel Header Component Code Points....................8
2.3 Specific Tunnel Types..................................9
2.3.1 VXLAN................................................9
2.3.2 VXLAN-GPE...........................................10
2.3.3 NVGRE...............................................11
2.3.4 L2TPv3..............................................11
2.3.5 GRE.................................................12
2.3.6 IP-in-IP............................................12
2.4 Tunneled Traffic Actions..............................13
3. Order of Traffic Filtering Rules.......................14
4. Flow Spec Validation...................................15
5. Security Considerations................................15
6. IANA Considerations....................................15
Normative References......................................16
Informative References....................................17
Acknowledgments...........................................18
Authors' Addresses........................................18
D. Eastlake, et al [Page 2]
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1. Introduction
BGP Flow Specification (flowspec [RFC5575bis]) is an extension to BGP
that supports the dissemination of traffic flow specification rules.
It uses the BGP control plane to simplify the distribution of Access
Control Lists (ACLs) and allows new filter rules to be injected to
all BGP peers simultaneously without changing router configuration. A
typical application of BGP flowspec is to automate the distribution
of traffic filter lists to routers for Distributed Denial of Service
(DDOS) mitigation.
BGP flowspec defines BGP Network Layer Reachability Information
(NLRI) formats used to distribute traffic flow specification rules.
AFI=1/SAFI=133 is for IPv4 unicast filtering. AFI=1/SAFI=134 is for
IPv4 BGP/MPLS VPN filtering. [FlowSpecV6] and [FlowSpecL2] extend the
flowspec rules for IPv6 and Layer 2 Ethernet packets respectively.
None of these previously defined flow specifications are suitable for
matching in cases of tunneling or encapsulation where there might be
duplicates of a layer of header such as two IPv6 headers in IP-in-IP
or a nested header sequence such as the Layer 2 and 3 headers
encapsulated in VXLAN [RFC7348].
In the cloud computing era, multi-tenancy has become a core
requirement for data centers. It is increasingly common to see
tunneled traffic with a field to distinguish tenants. An example is
the Network Virtualization Over Layer 3 (NVO3 [RFC8014]) overlay
technology that can satisfy multi-tenancy key requirements. VXLAN
[RFC7348] and NVGRE [RFC7637] are two typical NVO3 encapsulations.
Other encapsulations such as IP-in-IP or GRE may be encountered.
Because these tunnel / overlay technologies involving an additional
level of encapsulation, flow specification that can match on the
inner header as well as the outer header and fields in any tunneling
header are needed.
In summary, Flow Specifications should be able to include inner
nested header information as well as fields specific to the type of
tunneling in use such as virtual network / tenant ID. This draft
specifies methods for accomplishing this using SAFI=TBD1 and a new
NLRI encoding.
1.1 Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
D. Eastlake, et al [Page 3]
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The reader is assumed to be familiar with BGP terminology. The
following terms and acronyms are used in this document with the
meaning indicated:
ACL - Access Control List
DDoS - Distributed Denial of Service (Attack)
DSCP - Differentiated Services Code Point
GRE - Generic Router Encapsulation [RFC2890]
L2TPv3 - Layer Two Tunneling Protocol - Version 3 [RFC3931]
NLRI - Network Layer Reachability Information
NVGRE - Network Virtualization Using Generic Routing Encapsulation
[RFC7637]
NVO3 - Network Virtual Overlay Layer 3 [RFC8014]
PE - Provider Edge
VN - virtual network
VXLAN - Virtual eXtensible Local Area Network [RFC7348]
D. Eastlake, et al [Page 4]
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2. Tunneled Traffic Flow Specification NLRI
The Flowspec rules specified in [RFC5575bis], [FlowSpecV6], and
[FlowSpecL2] cannot match or filter tunneled traffic based on the
tunnel type, any tunnel header fields, or headers past the tunnel
header. To enable flow specification of tunneled traffic, a new SAFI
(TBD1) and NLRI encoding are introduced. This encoding, shown in
Figure 1, enables flow specification of more than one layer of header
when needed.
D. Eastlake, et al [Page 5]
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+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Length 2 octets |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Tunnel Type 2 octets |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Flags:
+--+--+--+--+--+--+--+--+
| D| I| Reserved | 1 octet
+--+--+--+--+--+--+--+--+
Optional Routing Distinguisher:
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| |
+ +
| |
+ Routing Distinguisher 8 octets +
| |
+ +
| |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Outer Flowspec:
+--+--+--+--+--+--+--+--+
| Outer Flowspec Length : 1 or 2 octets
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Outer Flowspec variable :
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Tunnel Header Flowspec:
+--+--+--+--+--+--+--+--+
| Tunnel Flowspec Length: 1 or 2 octets
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Tunnel Header Flowspec variable :
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Optional Inner Flowspec:
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Inner AFI 2 octets |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Inner Flowspec Length : 1 or 2 octets
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| Inner Flowspec variable :
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Figure 1. Tunneled Traffic Flowspec NLRI
Length - The NLRI Length including the Tunnel Type encoded as an
unsigned integer.
Tunnel Type - The type of tunnel using a value from the IANA BGP
Tunnel Encapsulation Attribute Tunnel Types registry.
Flags: D bit - Indicates the presence of the Routing Distinguisher
(see below).
D. Eastlake, et al [Page 6]
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Flags: I bit - Indicates the presence of the Inner AFI and the Inner
Flowspec (see below).
Flags: Reserved - Six bits that MUST be sent as zero and ignored on
receipt.
Routing Distinguisher - If the outer Layer 3 address belongs to a
BGP/MPLS VPN, the routing distinguisher is included to indicate
traffic filtering within that VPN. Because NVO3 outer layer
addresses normally belong to a public network, a Route
Distinguisher field is normally not needed for NVO3.
Outer Flowspec / Length - The flow specification for the outer
header. The length is encoded as provided in Section 4.1 of
[RFC5575bis]. The AFI for the Outer Flowspec is the AFI at the
beginning of the BGP multiprotocol MP_REACH_NLRI or
MP_UNREACH_NLRI containing the tunneled traffic flow
specification NLRI.
Tunnel Header Flowspec / Length - The flow specification for the
tunneling header. This specifies matching criterion on tunnel
header fields. The tunnel type itself is indicated by the
Tunnel Type field above. For some types of tunneling, such as
IP-in-IP, there may be no tunnel header fields. For other types
of tunneling, there may be several tunnel header fields on
which matching can be specified with this flowspec.
Inner AFI - Depending on the Tunnel Type, there may be an Inner AFI
that indicates the address family for the inner flow
specification. There is no need for a SAFI as the treatment of
this inner AFI and following flowspec is indicated by the outer
SAFI TBD1, the SAFI for a tunneled traffic flow specification.
Inner Flowspec / Length - Depending on the Tunnel Type, there may be
an inner flowspec for the header level encapsulated within the
outer header. The length is encoded as provided in Section 4.1
of [RFC5575bis].
A Tunneled Traffic Flowspec matches if the Outer Flowspec, Tunnel
Header Flowspec, and Inner Flowspec, if present, all match and the
Routing Distinguisher applies, if present. An omitted (as can be done
for the Inner Flowspec) or null flowspec is considered to always
match.
2.1 The SAFI Code Point
Use of the tunneled traffic flow specification NLRI format is
indicated by SAFI=TBD1. This is used in conjunction with the AFI for
D. Eastlake, et al [Page 7]
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the outer header, that is AFI=1 for IPv4, AFI=2 for IPv6, and AFI=6
for Layer 2.
2.2 Tunnel Header Component Code Points
For flowspec based on most tunneling, there are tunnel header fields
that can be tested by components that appear in the Tunnel Header
Flowspec field. The types for these components are specified in a
Tunnel Header Flowspec component registry (see Section 6).
All Tunnel Header field components defined below and all such
components added in the future have a TLV structure as follows:
- one octet of type followed by
- one octet giving the length as an unsigned integer number of
octets followed by
- the specific matching operations/values as determined by the
type.
Type 1 - VN ID
Encoding: <type (1 octet), length (1 octet), [op, value]+>.
Defines a list of {operation, value} pairs used to match the
24-bit VN ID that is used as the tenant identification in some
tunneling headers. For VXLAN encapsulation, the VN ID is the
VNI. For NVGRE encapsulation, the VN ID is the VSID. op is
encoded as specified in Section 4.2.3 of [RFC5575bis]. Values
are encoded as a 1, 2, or 4 octet quantity. If value is
24-bits, it is left-justified in the first 3 octets of the
value and the last value octet MUST be sent as zero and ignored
on receipt.
Type 2 - Flow ID
Encoding: <type (1 octet), length (1 octet), [op, value]+>
Defines a list of {operation, value} pairs used to match 8-bit
Flow ID fields which are currently only useful for NVGRE
encapsulation. op is encoded as specified in Section 4.2.3 of
[RFC5575bis]. Values are encoded as a 1-octet quantity.
Type 3 - Session
Encoding: <type (1 octet), length (1 octet), [op, value]+>
Defines a list of {operation, value} pairs used to match a
32-bit Session field. This field is called Key in GRE [RFC2890]
encapsulation and Session ID in L2TPv3 encapsulation. op is
encoded as specified in Section 4.2.3 of [RFC5575bis]. Values
are encoded as a 1, 2, or 4 octet quantity.
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Type 4 - Cookie
Encoding: <type (1 octet), length (1 octet), [op, value]+>
Defines a list of {operation, value} pairs used to match a
variable length Cookie field. This is only useful in L2TPv3
encapsulation. op is encoded as specified in Section 4.2.3 of
[RFC5575bis]. Values are encoded as a 1, 2, 4, or 8 octet
quantity. If the Cookie does not fit exactly into the value
length, it is left justified, that is, padded with following
octets the MUST be sent as zero and ignored on receipt.
Type 5 - VXLAN-GPE Flags
Encoding: <type (1 octet), length (1 octet), [op, bitmask]+>
Defines a list of {operation, value} pairs used to match
against the VXLAN-GPE flags field. op is encoded as in Section
4.2.9 of [RFC5575bis]. bitmask is encoded as 1 octet.
2.3 Specific Tunnel Types
The following subsections describe how to handle flow specification
for several specific tunnel types.
2.3.1 VXLAN
The headers on a VXLAN [RFC7348] data packet are an outer Ethernet
header, an outer IP header, a UDP header, the VXLAN header, and an
inner Ethernet header. This inner Ethernet header is frequently, but
not always, followed by an inner IP header. If the tunnel type is
VXLAN, the I flag MUST be set.
If the outer Ethernet header is not being matched, the version (IPv4
or IPv6) of the outer IP header is indicated by the AFI at the
beginning of the multiprotocol MP_REACH_NLRI or MP_UNREACH_NLRI
containing the tunneled traffic flow specification NLRI. The outer
Flowspec is used to filter the outer headers including, if desired,
the UDP header.
If the outer Ethernet header is being matched, then the initial AFI
is 6 [FlowSpecL2] and the Outer Flowspec can match the outer Ethernet
header, specify the IP version of the outer IP header, and match that
IP header including, if desired, the UDP header.
The Tunnel Header Flowspec can be used to filter on the VXLAN header
VN ID (VNI).
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The Inner Flowspec can be used on the Inner Ethernet header
[FlowSpecL2] and any following IP header. If the inner AFI is 6,
then the inner Flowspec provides filtering of the Layer 2 header,
indicates whether filtering on a following IPv4 or IPv6 header is
desired, and if it is desired provides the Flowspec components for
that filtering. If the Inner AFI is 1 or 2, the Inner Ethernet
header is not matched and to match the Flowspec the Inner Ethernet
header must be followed by an IPv4 or IPv6 header, respectively, and
the inner Flowspec is used to filter that inner IP header.
The inner MAC/IP address is associated with the VN ID. In the NVO3
terminating into a VPN scenario, if multiple access VN IDs map to one
VPN instance, one shared VN ID can be carried in the flowspec rule to
enforce the rule on the entire VPN instance and the shared VN ID and
VPN correspondence should be configured on each VPN PE beforehand. In
this case, the function of the Layer 3 VN ID is the same as a Route
Distinguisher: it acts as the identification of the VPN instance.
2.3.2 VXLAN-GPE
VXLAN-GPE [GPE] is similar to VXLAN. The VXLAN-GPE header is the same
size as the VXLAN header but has been extended from the VXLAN header
by specifying a number of bits that are reserved in the VXLAN header.
In particular, a number of additional flag bits are specified and a
Next Protocol field is added that is valid if the P flag bit is set.
These flags bits can be tested using the VXLAN-GPE Flags flowspec
component defined above. VXLAN and VXLAN-GPE are distinguished by the
port number in the UDP header the precedes the VXLAN or VXLAN-GPE
headers.
If the VXLAN-GPE header P flag is zero, then that header is followed
by the same sequence as for VXLAN and the same flowspec choices apply
(see Section 2.3.1).
If the VXLAN-GPE header P flag is one and that header's next protocol
field is 1, then the VXLAN-GPE header is followed by an IPv4 header.
The Inner Flowspec matches only if the Inner AFI is 1 and the Inner
Flowspec matches.
If the VXLAN-GPE header P flag is one and that header's next protocol
field is 2, then the VXLAN-GPE header is followed by an IPv6 header.
The Inner Flowspec match only if the Inner AFI is 2 and the Inner
Flowspec matches.
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2.3.3 NVGRE
NVGRE [RFC7637] is very similar to VXLAN except that the UDP header
and VXLAN header immediately after the outer IP header are replaced
by a GRE (Generic Router Encapsulation) header. The GRE header as
used in NVGRE has no Checksum or Reserved1 field as shown in
[RFC2890] but there are Virtual Subnet ID and Flow ID fields in place
of what is labeled in [RFC2890] as the Key field. Processing and
restrictions for NVGRE are as in Section 2.3.1 eliminating references
to a UDP header and replacing references to the VXLAN header and its
VN ID with references to the GRE header and its VN ID (VSID) and Flow
ID.
2.3.4 L2TPv3
The headers on an L2TPv3 [RFC3931] packets are an outer Ethernet
header, an outer IP header, the L2TPv3 header, an inner Ethernet
header, and possibly an inner IP header if indicated by the inner
Ethernet header EtherType. The Outer Flowspec operates on the outer
headers that precede the GRE header. The version of IP in the outer
IP header is specified by either the outer AFI at the beginning of
the MP_REACH_NLRI or MP_UNREACH_NLRI or, if that AFI is 6 (L2),
optionally specified by the inner AFI within that L2 flowspec.
The L2TPv3 header consists of a 32-bit Session ID followed by a
variable length Cookie (maximum length 8 octets). The Session ID and
Cookie can be filtered for by using the Session and Cookie flowspec
components in the Tunnel Header Flowspec. To filter on Cookie or even
be able to bypass Cookie and parse the remainder of the L2TPv3
packet, the node implementing flowspec needs to know the length
and/or value of the Cookie fields of interest. This is negotiated at
L2TPv3 session establishment and it is out of scope for this document
how the node would learn this information. Of course, if flowspec is
being used for DDOS mitigation and the Cookie has a fixed length
and/or value in the DDOS traffic, this could be learned by inspecting
that traffic.
If the I flag bit is zero, then no filtering is done on data beyond
the L2TPv3 header. If the I flag is one, indicating the presence of
an Inner Flowspec, and the node implementing flowspec does not know
the length of the L2TPv3 header Cookie, the match fails. If that node
does know the length of that Cookie, the Inner Flowspec if matched
against the headers at the beginning of that data using the Inner
AFI. If that Inner AFI is 1 or 2, then an inner IP header is required
and filtering can be done on the Ethernet header immediately after
the L2TPv3 header and the following IPv4 or IPv6 headers
respectively. If the Inner AFI is 6, filtering is done on the inner
Ethernet header and, if a non-zero inner AFI is specified within the
D. Eastlake, et al [Page 11]
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inner L2 flowspec, done on the following IP header [FlowSpecL2].
2.3.5 GRE
Generic Router Encapsulation (GRE [RFC2890]) is another type of
encapsulation. The Outer Flowspec operates on the outer headers that
precede the GRE header. The version of IP is specified by the outer
AFI at the beginning of the MP_REACH_NLRI or MP_UNREACH_NLRI.
If the I flag bit is zero, no filtering is done on data after the GRE
header. If the I flag bit is one, then there is an inner AFI and
flowspec and the Protocol Type field of the GRE header must match the
Inner AFI as follows for the Flowspec to match:
GRE Protocol Type Inner AFI
------------------- -----------
0x0800 (IPv4) 1
0x86DD (IPv6) 2
0x6558 6
With the I flag a one and the Inner AFI and GRE Protocol Type fields
match, the Inner Flowspec is used to filter the inner IP headers
(Inner AFI=1 or 2) or the inner Ethernet header and optionally a
following IP header (Inner AFI=6).
2.3.6 IP-in-IP
IP-in-IP encapsulation is indicated when an outer IP header indicates
an inner IP IPv4 or IPv6 header by the value of the outer IP header's
Protocol (IPv4) or Next Protocol (IPv6) field.
The IP version of the outer IP header (IPv4 or IPv6) matched is
indicated by an AFI of 1 or 2 at the beginning of the MP_REACH_NLRI
or MP_UNREACH_NLRI while if that AFI is 6, it indicates a match on
the out Ethernet header and, optionally, the following IP Header
[FlowSpecL2]. The IP version of the inner IP header is indicated by
the Inner AFI and the Inner Flowspec applies to the inner IP header.
There are no fields that can be matched by the Tunnel Header Flowspec
in the case of IP-in-IP.
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2.4 Tunneled Traffic Actions
The traffic filtering actions previously specified in [RFC5575bis]
and [FlowSpecL2] are used for tunneled traffic. For Traffic Marking
in NVO3, only the DSCP in the outer header can be modified.
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3. Order of Traffic Filtering Rules
The following rules determine which flowspec takes precedence where
one or more are applicable and at least one of the applicable
flowspecs is a tunneled traffic flowspec:
- In comparing an applicable tunneled traffic flow specification
with an applicable non-tunneled flow specification, the tunneled
specification has precedence.
- If comparing tunneled traffic flow specifications, if all are
applicable, the tunnel types will be the same. Any that have a
Routing Distinguisher will take precedence over those without a
Routing Distinguisher. Of those with a Routing Distinguisher, all
applicable flowspecs will have the same Routing Distinguisher.
- At this point in the process, all remaining contenders for the
highest precedence will either not have a Routing Distinguisher or
have equal Routing Distinguishers. If more than one contender
remain, those with an L2 Outer Flowspec take precedence over those
with an L3 Outer Flowspec. If the Outer Flowspec AFI is the same,
their order of precedence is determined by comparing the Outer
Flowspecs as described in [RFC5575bis] and [FlowSpecV6] for AFI
for 1 or 2 respectively or [FlowSpecL2] for AFI=6.
- If the Outer Flowspecs are equal, then the Tunnel Header Flowspecs
are compared using the usual sequential component comparison
process [RFC5575bis].
- If the Tunnel Header Flowspecs are equal then compare the "I"
flag. Those with an Inner Flowspec take precedence over those
without an Inner Flowspec. If you get to this stage in the
ordering process, those without an Inner Flowspec are equal. For
those with an Inner Flowspec, check the Inner AFI. An L2 Inner AFI
(AFI=6) takes precedence over an L2 Inner AFI.
- If the Inner AFIs are equal, precedence is determined by comparing
the Inner Flowspecs as described in [FlowSpecL2] for L2 or
[RFC5575bis] for L3.
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4. Flow Spec Validation
Flowspecs received over AFI=1/SAFI=TBD1 or AFI=2/SFAI=TBD1 are
validated, using only the Outer Flowspec, against routing
reachability received over AFI=1/SAFI=133 and AFI=2/SAFI=133
respectively, as modified by [FlowSpecOID].
5. Security Considerations
No new security issues are introduced to the BGP protocol by this
specification.
For general Flowspec security considerations, see [rfc5575bis].
6. IANA Considerations
IANA is requested to assign a new SAFI as follows:
Value Description Reference
----- ------------------------------------------ ---------------
TBD1 Tunneled traffic flow specification rules [This document]
IANA is requested to create a Tunnel Header Flow Spec Component Type
registry on the Flow Spec Component Types registries web page as
follows:
Name: Tunnel Flow Spec Component Types
Reference: [this document]
Registration Procedures:
0 Reserved
1-127 Specification Required
128-254 First Come First Served
255 Reserved
Initial contents:
Type Name Reference
----- -------------- -----------------
0 reserved [this document]
1 VN ID [this document]
2 Flow ID [this document]
3 Session [this document]
4 Cookie [this document]
5 VXLAN-GPE Flags [this document]
6-254 unassigned [this document]
255 reserved [this document]
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Normative References
[RFC2119] - Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119,
March 1997, <https://www.rfc-editor.org/info/rfc2119>.
[RFC2890] - Dommety, G., "Key and Sequence Number Extensions to GRE",
RFC 2890, DOI 10.17487/RFC2890, September 2000,
<https://www.rfc-editor.org/info/rfc2890>.
[RFC3931] - Lau, J., Ed., Townsley, M., Ed., and I. Goyret, Ed.,
"Layer Two Tunneling Protocol - Version 3 (L2TPv3)", RFC 3931,
DOI 10.17487/RFC3931, March 2005, <https://www.rfc-
editor.org/info/rfc3931>.
[RFC7348] - Mahalingam, M., Dutt, D., Duda, K., Agarwal, P., Kreeger,
L., Sridhar, T., Bursell, M., and C. Wright, "Virtual
eXtensible Local Area Network (VXLAN): A Framework for
Overlaying Virtualized Layer 2 Networks over Layer 3 Networks",
RFC 7348, DOI 10.17487/RFC7348, August 2014, <https://www.rfc-
editor.org/info/rfc7348>.
[RFC7637] - Garg, P., Ed., and Y. Wang, Ed., "NVGRE: Network
Virtualization Using Generic Routing Encapsulation", RFC 7637,
DOI 10.17487/RFC7637, September 2015, <https://www.rfc-
editor.org/info/rfc7637>.
[RFC8174] - Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May
2017, <https://www.rfc-editor.org/info/rfc8174>.
[FlowSpecL2] - W. Hao, et al, "Dissemination of Flow Specification
Rules for L2 VPN", draft-ietf-idr-flowspec-l2vpn, work in
progress.
[FlowSpecOID] - J. Uttaro, J. Alcaide, C. Filsfils, D. Smith, P.
Mohapatra, "Revised Validation Procedure for BGP Flow
Specifications", draft-ietf-idr-bgp-flowspec-oid, work in
progress.
[FlowSpecV6] - R. Raszuk, et al, "Dissemination of Flow Specification
Rules for IPv6", draft-ietf-idr-flow-spec-v6, work in progress.
[RFC5575bis] - Hares, S., Loibl, C., Raszuk, R., McPherson, D.,
Bacher, M., "Dissemination of Flow Specification Rules", draft-
ietf-idr-rfc5575bis, Work in progress.
D. Eastlake, et al [Page 16]
INTERNET-DRAFT BGP Tunnel Flowspec
Informative References
[RFC8014] - Black, D., Hudson, J., Kreeger, L., Lasserre, M., and T.
Narten, "An Architecture for Data-Center Network Virtualization
over Layer 3 (NVO3)", RFC 8014, DOI 10.17487/RFC8014, December
2016, <https://www.rfc-editor.org/info/rfc8014>.
[GPE] - P. Quinn, et al, "Generic Protocol Extension for VXLAN",
draft-ietf-nvo3-vxlan-gpe, work in progress.
D. Eastlake, et al [Page 17]
INTERNET-DRAFT BGP Tunnel Flowspec
Acknowledgments
The authors wish to acknowledge the important contributions of Jeff
Haas, Susan Hares, Qiandeng Liang, Nan Wu, Yizhou Li, Robert Raszuk,
and Lucy Yong.
Authors' Addresses
Donald Eastlake
Futurewei Technologies
2386 Panoramic Circle
Apopka, FL 32703 USA
Tel: +1-508-333-2270
Email: d3e3e3@gmail.com
Weiguo Hao
Huawei Technologies
101 Software Avenue,
Nanjing 210012 China
Email: haoweiguo@huawei.com
Shunwan Zhuang
Huawei Technologies
Huawei Bld., No.156 Beiqing Rd.
Beijing 100095 China
Email: zhuangshunwan@huawei.com
Zhenbin Li
Huawei Technologies
Huawei Bld., No.156 Beiqing Rd.
Beijing 100095 China
Email: lizhenbin@huawei.com
Rong Gu
China Mobile
Email: gurong_cmcc@outlook.com
D. Eastlake, et al [Page 18]
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D. Eastlake, et al [Page 19]